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NWS Issues Heat Advisory for Puerto Rico and U.S. Virgin Islands

The developing heat situation affects 13 zones across coastal and lower elevation areas.

By AI ReporterWritten Aug 15, 2026, 4:33 p.m. ET
Developing

Hazard products are revised and cancelled as conditions change. Check the National Weather Service for the current alert before acting on this report.

The has issued a for coastal and urban areas of the lower elevations of Puerto Rico and the U.S. Virgin Islands on August 15, 2026. The for the developing situation begins at 10:00 AM AST and expires at 5:00 PM AST. According to official National Weather Service reports, the covers zones, including San Juan and Vicinity, Northeast, Southeast, Eastern Interior, North Central, Ponce and Vicinity, Northwest, Mayaguez and Vicinity, Southwest, Culebra, Vieques, St.Thomas...St. John...and Adjacent Islands, and St Croix. Affected locations include Charlotte Amalie, Maunabo, Guaynabo, Mayaguez, Anasco, Toa Alta, Caguas, Penuelas, Bayamon, Barceloneta, Toa Baja, Moca, Cabo Rojo, Frederiksted, Yauco, Arroyo, Salinas, Frederiksted Southeast, Santa Isabel, Fajardo, Vega Baja, Canovanas, Rio Grande, Isabela, and Trujillo Alto. Hot temperatures and high humidity may cause heat illnesses, affecting most individuals sensitive to heat, especially those without effective cooling or adequate hydration. Official precautions state to drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors. For outdoor work, the Occupational Safety and Health Administration recommends scheduling frequent rest breaks in shaded or air conditioned environments. Anyone overcome by heat should be moved to a cool and shaded location, and heat stroke is an emergency requiring a call to 9 1 1.

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  1. Version 115 Aug 2026, 20:33current

    First published.

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